Protective enclosure for an annular shaped birthday cake



FIG. 1 is a perspective view thereof, the broken line disclosure representing a plurality of candles and a cake being for illustrative purposes only forming no part of the claimed design;

FIG. 2 is a top view thereof, the broken line disclosure representing a plurality of candles and a cake being for illustrative purposes only forming no part of the claimed design; and,

FIG. 3 is a side view thereof, the broken line disclosure representing a plurality of candles and a cake being for illustrative purposes only forming no part of the claimed design. 

The ornamental design for a protective enclosure for an annular shaped birthday cake, as shown and described. 